Mobile communication method, radio base station, and mobile station

Abstract

A C-RNTI ph in a phantom cell is allocated to a mobile station UE after the mobile station UE is identified. A mobile communication method according to the present invention includes the steps of: when a cell # 10 formed by linking multiple small cells is established in a manner as to at least partially overlap a coverage area of a cell # 1 under control of a radio base station eNB# 1 , notifying a mobile station UE# 1 in communication in the cell # 1 of a C-RNTI ph in the cell # 10 by the radio base station eNB# 1 by sending “RRC connection reconfiguration”; and setting, by the mobile station UE# 1 , the C-RNTI ph in the cell # 10 in addition to a C-RNTI macro in the cell # 1.

1 . A mobile communication method, comprising the step of:
 when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, notifying a mobile station in communication in the macro cell of a cell identifier in the phantom cell by the radio base station by sending a connection reconfiguration signal; and   setting, by the mobile station, the cell identifier in the phantom cell in addition to a cell identifier in the macro cell.   
     
     
         2 . A mobile communication method, comprising the step of:
 when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, and when a distance between a first mobile station and a second mobile station in which a same cell identifier is set and which are in communication in the macro cell becomes shorter than a threshold,   notifying the first mobile station of a cell identifier in the phantom cell by the radio base station by sending a connection reconfiguration signal; and   setting, by the first mobile station, the notified cell identifier in the phantom cell in addition to a cell identifier in the macro cell.   
     
     
         3 . A mobile communication method, comprising the step of:
 when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, starting a non-contention based random access procedure by a mobile station in communication in the macro cell and by the radio base station;   notifying the mobile station of a cell identifier in the phantom cell by sending a random access response signal by the radio base station in the non-contention based random access procedure; and   setting, by the mobile station, the cell identifier in the phantom cell in addition to a cell identifier in the macro cell.   
     
     
         4 . A mobile communication method, comprising the step of:
 when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, and when a distance between a first mobile station and a second mobile station in which a same cell identifier is set and which are in communication in the macro cell becomes shorter than a threshold,   starting a non-contention based random access procedure by the radio base station and the first mobile station;   notifying the first mobile station of a cell identifier in the phantom cell by sending a random access response signal by the radio base station in the non-contention based random access procedure; and   setting, by the first mobile station, the notified cell identifier in the phantom, cell in addition to a cell identifier in the macro cell.   
     
     
         5 . A radio base station, comprising:
 a transmission unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, notify a mobile station in communication in the macro cell of a cell identifier in the phantom cell by sending a connection reconfiguration signal.   
     
     
         6 . A radio base station, comprising:
 a transmission unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, and when a distance between a first mobile station and a second mobile station in which a same cell identifier is set and which are in communication in the macro cell becomes shorter than a threshold, notify the first mobile station of a cell identifier in the phantom cell by sending a connection reconfiguration signal.   
     
     
         7 . A radio base station, comprising:
 a transmission unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, start a non-contention based random access procedure with a mobile station in communication with the radio base station in the macro cell and notify the mobile station of a cell identifier in the phantom cell by sending a random access response signal in the non-contention based random access procedure.   
     
     
         8 . A radio base station, comprising:
 a transmission unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, and when a distance between a first mobile station and a second mobile station in which a same cell identifier is set and which are in communication in the macro cell becomes shorter than a threshold, start a non-contention based random access procedure with the first mobile station and notify the first mobile station of a cell identifier in the phantom cell by sending a random access response signal in the non-contention based random access procedure.   
     
     
         9 . A mobile station, comprising:
 a reception unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, and when the mobile station is in communication in the macro cell, acquire a cell identifier in the phantom cell from the radio base station via a connection reconfiguration signal; and   a setting unit configured to set the cell identifier in the phantom cell in addition to a cell identifier in the macro cell.   
     
     
         10 . A mobile station, comprising:
 a reception unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, when the mobile station is in communication in the macro cell, and when a distance to another mobile station, in which the same cell identifier as that of the mobile station is set, becomes shorter than a threshold, acquire a cell identifier in the phantom cell from the radio base station via a connection reconfiguration signal; and   a setting unit configured to set the notified cell identifier in the phantom cell in addition to a cell identifier in the macro cell.   
     
     
         11 . A mobile station, comprising:
 a reception unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, and when the mobile station is in communication in the macro cell, start a non-contention based random access procedure with the radio base station, and acquire a cell identifier in the phantom cell from the radio base station via a radon access response signal in the non-contention based random access procedure; and   a setting unit configured to set the cell identifier in the phantom cell in addition to a cell identifier in the macro cell.   
     
     
         12 . A mobile station, comprising:
 a reception unit configured to, when a phantom cell formed by linking a plurality of small cells is established in a manner as to at least partially overlap a coverage area of a macro cell under control of a radio base station, when the mobile station is in communication in the macro cell, and when a distance to another mobile station, in which the same cell identifier as that of the mobile station is set, becomes shorter than a threshold, start a non-contention based random access procedure with the radio base station and acquire a cell identifier in the phantom cell from the radio base station via a random access response signal in the non-contention based random access procedure; and   a setting unit configured to set the notified cell identifier in the phantom cell in addition to a cell identifier in the macro cell.